ADA4899-1_07 AD [Analog Devices], ADA4899-1_07 Datasheet

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ADA4899-1_07

Manufacturer Part Number
ADA4899-1_07
Description
Unity-Gain Stable, Ultralow Distortion, 1 nV/?Hz Voltage Noise, High Speed Op Amp
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
Unity-gain stable
Ultralow noise: 1 nV/√Hz, 2.6 pA/√Hz
Ultralow distortion −117 dBc at 1 MHz
High speed
Offset voltage: 230 μV maximum
Low input bias current: 100 nA
Wide supply voltage range: 5 V to 12 V
Supply current: 14.7 mA
High performance pinout
Disable mode
APPLICATIONS
Analog-to-digital drivers
Instrumentation
Filters
IF and baseband amplifiers
DAC buffers
Optical electronics
GENERAL DESCRIPTION
The ADA4899-1 is an ultralow noise (1 nV/√Hz) and distortion
(<−117 dBc @1 MHz) unity-gain stable voltage feedback op
amp, the combination of which makes it ideal for 16-bit and
18-bit systems. The ADA4899-1 features a linear, low noise
input stage and internal compensation that achieves high slew
rates and low noise even at unity gain. The Analog Devices, Inc.
proprietary next-generation XFCB process and innovative
circuit design enable such high performance amplifiers.
The ADA4899-1 drives 100 Ω loads at breakthrough performance
levels with only 15 mA of supply current. With the wide supply
voltage range (4.5 V to 12 V), low offset voltage (230 μV maxi-
mum), wide bandwidth (600 MHz), and slew rate (310 V/μs),
the ADA4899-1 is designed to work in the most demanding
applications. The ADA4899-1 also features an input bias current
cancellation mode that reduces input bias current by a factor of 60.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
−3 dB bandwidth: 600 MHz (G = +1)
Slew rate: 310 V/μs
1 nV/√Hz Voltage Noise, High Speed Op Amp
Unity-Gain Stable, Ultralow Distortion,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The ADA4899-1 is available in a 3 mm × 3 mm LFCSP and an
8-lead SOIC package. Both packages feature an exposed metal
paddle that improves heat transfer to the ground plane, which is
a significant improvement over traditional plastic packages. The
ADA4899-1 is rated to work over the extended industrial
temperature range, −40°C to +125°C.
–100
–110
–120
–130
–40
–50
–60
–70
–80
–90
0.1
G = +1
V
R
V
S
OUT
L
Figure 3. Harmonic Distortion vs. Frequency
= ±5V
= 1kΩ
FEEDBACK
FEEDBACK
CONNECTION DIAGRAMS
= 2V p-p
DISABLE
Figure 2. 8-Lead SOIC_N_EP (RD-8-1)
Figure 1. 8-Lead LFCSP_VD (CP-8-2)
©2005–2007 Analog Devices, Inc. All rights reserved.
–V
–IN
+IN
+IN
–IN
S
1
2
3
4
1
2
3
4
NC = NO CONNECT
1
FREQUENCY (MHz)
ADA4899-1
ADA4899-1
HD2
ADA4899-1
8
7
6
5
8
7
6
5
10
DISABLE
+V
V
–V
+V
V
NC
–V
HD3
OUT
OUT
S
S
S
S
www.analog.com
100

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ADA4899-1_07 Summary of contents

Page 1

... Trademarks and registered trademarks are the property of their respective owners. Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage Noise, High Speed Op Amp The ADA4899-1 is available × LFCSP and an 8-lead SOIC package. Both packages feature an exposed metal paddle that improves heat transfer to the ground plane, which is a significant improvement over traditional plastic packages ...

Page 2

... Updated Outline Dimensions ....................................................... 18 4/06—Rev Rev. A Changes to Figure 2.......................................................................... 1 10/05—Revision 0: Initial Version Packaging Innovation ................................................................ 13 DISABLE Pin .............................................................................. 13 Applications..................................................................................... 14 Unity Gain Operation................................................................ 14 Recommended Values for Various Gains................................ 14 Noise ............................................................................................ 15 ADC Driver................................................................................. 15 DISABLE Pin Operation ........................................................... 16 ADA4899-1 Mux ........................................................................ 16 Circuit Considerations .............................................................. 16 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 18 Rev Page ...

Page 3

... kΩ 100 Ω L Sinking/sourcing MHz, DISABLE = −V S DISABLE = − (input referred) S −V = − −4 V (input referred) S Rev Page ADA4899-1 Min Typ Max 600 80 35 310 50 −123/−123 −80/−86 1.0 2.6 5.2 35 230 5 −6 −12 − ...

Page 4

... ADA4899-1 SPECIFICATIONS WITH +5 V SUPPLY 25° + kΩ to midsupply, unless otherwise noted Table 2. Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Harmonic Distortion, HD2/HD3 (dBc) Input Voltage Noise Input Current Noise ...

Page 5

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. MAXIMUM POWER DISSIPATION The maximum safe power dissipation in the ADA4899-1 package is limited by the associated rise in junction temperature ( the die. The plastic encapsulating the die locally reaches J the junction temperature. At approximately 150° ...

Page 6

... ADA4899-1 TYPICAL PERFORMANCE CHARACTERISTICS ± 1kΩ 25mV p-p OUT 0 – +10 –6 –9 – FREQUENCY (MHz) Figure 5. Small Signal Frequency Response for Various Gains ± 100Ω 25mV p-p OUT 0 – +10 –6 –9 – FREQUENCY (MHz) Figure 6 ...

Page 7

... Figure 14. Large Signal Frequency Response for Various Output Voltages 100 –20 1000 0.001 1k 100 10 1M 10M 100M Rev Page ADA4899 ± 100Ω OUT p-p OUT p-p OUT 1 10 100 FREQUENCY (MHz) ...

Page 8

... ADA4899-1 – ±5V S – 1kΩ p-p OUT –60 –70 –80 –90 HD2 –100 –110 –120 –130 0.1 1 FREQUENCY (MHz) Figure 17. Harmonic Distortion vs. Frequency – 1kΩ L – 5MHz –60 –70 –80 HD2 –90 HD3 –100 –110 –120 OUTPUT AMPLITUDE (V p-p) Figure 18 ...

Page 9

... Figure 27. Large Signal Transient Response for Various Gains 1.5 1.0 0.5 0 –0.5 –1.0 –1 100 0 Rev Page ADA4899 ± 1kΩ 15pF 0pF 15pF L R SNUB C = 5pF TIME (ns) Figure 26. Small Signal Transient Response for ...

Page 10

... ADA4899-1 1.5 1.0 0.5 INPUT ERROR 0 OUTPUT –0.5 –1.0 –1 100 TIME (ns) Figure 29. Settling Time 1.5 1.0 INPUT 0.5 0 OUTPUT ERROR –0.5 –1.0 –1 100 TIME (ns) Figure 30. Settling Time 100k 10k 1k 100 10 0 FREQUENCY (MHz) Figure 31. Input Impedance vs. Frequency 0.3 10 0.2 1 0.1 0 0.1 –0.1 0.01 – ...

Page 11

... Figure 38. Input Offset Voltage Distribution (V 500 400 300 200 100 0 –200 1000 Figure 39. Input Offset Voltage Distribution (V = ±5V S 0.6 0.9 Rev Page ADA4899-1 N: 4651 MEAN: –4.92µV SD: 29.22µ –150 –100 – 100 150 VOLTAGE OFFSET (µ 4655 MEAN: – ...

Page 12

... ADA4899-1 TEST CIRCUITS +V S 10µF 0.1µF 24.9Ω 49.9Ω 10µF 0.1µF –V S Figure 40. Typical Noninverting Load Configuration + 10Ω 1kΩ 49.9Ω 10Ω 10µF 0.1µF –V S Figure 41. Positive Power Supply Rejection +V S 10µF 1kΩ 1kΩ 1kΩ 53.6Ω 1kΩ 10µF –V S Figure 42 ...

Page 13

... Currents should be limited through these diodes less by using a series limiting resistor. PACKAGING INNOVATION The ADA4899-1 is available in both a SOIC and an LFCSP, each of which has a thermal pad that allows the device to run cooler, thereby increasing reliability. To help avoid routing around the ...

Page 14

... ADA4899-1 APPLICATIONS UNITY-GAIN OPERATION The ADA4899-1 schematic for unity-gain configuration is nearly a textbook example (see Figure 46). The only exception is the small 24.9 Ω series resistor at the noninverting input. The series resistor is only required in unity-gain configurations; higher gains negate the need for the resistor. In Table 4, it can be seen that the overall noise contribution of the amplifier and the 24.9 Ω ...

Page 15

... The ultralow noise and distortion performance of the ADA4899-1 makes it an excellent candidate for driving 16-bit ADCs. The schematic for a single-ended input buffer using the ADA4899-1 and the AD7677 MSPS, 16-bit ADC, is shown in Figure 49. Table 5 shows the performance data of the ADA4899-1 and the AD7677. ...

Page 16

... PCB Layout ADA4899-1 Because the ADA4899-1 can operate up to 600 MHz essential that RF board layout techniques be employed. All 0.1µF ground and power planes under the pins of the ADA4899-1 –5V ...

Page 17

... The returns for the input, output terminations, bypass capacitors, and R be kept as close to the ADA4899-1 as possible. The output load ground and the bypass capacitor grounds should be returned to the same point on the ground plane to minimize parasitic trace inductance, ringing, and overshoot and to improve distortion performance ...

Page 18

... Temperature Range 1 ADA4899-1YRDZ –40°C to +125°C 1 ADA4899-1YRDZ-R7 –40°C to +125°C 1 ADA4899-1YRDZ-RL –40°C to +125°C 1 ADA4899-1YCPZ-R2 –40°C to +125°C 1 ADA4899-1YCPZ-R7 –40°C to +125°C 1 ADA4899-1YCPZ-RL –40°C to +125° RoHS Compliant Part. 5.00 (0.197) 4.90 (0.193) 2.29 (0.090) 4.80 (0.189 6.20 (0.244) TOP VIEW 6 ...

Page 19

... NOTES Rev Page ADA4899-1 ...

Page 20

... ADA4899-1 NOTES ©2005–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05720-0-6/07(B) Rev Page ...

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